A light source device for generating excitation light that is irradiated to a phosphor includes: a plurality of light sources that emits laser light; and a microlens array that includes a plurality of microlenses arranged in two directions orthogonal to each other, that is incident the laser light emitted from the light source, and that irradiates the phosphor with the output light as an excitation light. The light source image of the light source at the irradiated surface of the microlens array is elliptical, and the long axis direction of the light source image intersects with both the two directions. A coordinate system includes: a first axis that is parallel to a principal ray of the laser light incident on the microlens array; and a second axis, in a direction in which the laser light emitted from the microlens array or the fluorescence emitted from the phosphor is reflected.
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3. The light source device according to claim 1, wherein said microlens array comprises a configuration in which a plurality of the microlenses are arranged in a lattice pattern.
This light source device generates excitation light for a phosphor, comprising multiple laser light sources and a microlens array. The array, with microlenses arranged orthogonally, receives laser light and directs it to the phosphor. The elliptical image of the light source on the array has its long axis intersecting both orthogonal microlens arrangement directions. Specifically, the microlens array's individual microlenses are arranged in a lattice pattern.
4. The light source device according to claim 1, wherein a microlens of the microlens array has a rectangular shape, and a long axis direction of the light source image and a direction of diagonal lines of the microlens are intersected.
This light source device generates excitation light for a phosphor, comprising multiple laser light sources and a microlens array. The array, with microlenses arranged orthogonally, receives laser light and directs it to the phosphor. The elliptical image of the light source on the array has its long axis intersecting both orthogonal microlens arrangement directions. Specifically, each microlens in the array has a rectangular shape, and the long axis direction of the elliptical light source image intersects with the direction of the diagonal lines of these rectangular microlenses.
5. The light source device according to claim 4, wherein an angle at which the long axis direction of the light source image and the direction of the diagonal lines of the microlens are intersected is 5 degrees or more.
This light source device generates excitation light for a phosphor, comprising multiple laser light sources and a microlens array. The array, with microlenses arranged orthogonally, receives laser light and directs it to the phosphor. The elliptical image of the light source on the array has its long axis intersecting both orthogonal microlens arrangement directions. Each microlens in the array has a rectangular shape, and the long axis direction of the elliptical light source image intersects with the direction of the diagonal lines of these rectangular microlenses. Furthermore, the angle at which the long axis of the light source image and the diagonal lines of the microlens intersect is 5 degrees or more.
6. The light source device according to claim 1, wherein an angle at which the long axis direction of the light source image and the direction in which the microlenses are aligned are intersected is 5 degrees or more.
This light source device generates excitation light for a phosphor, comprising multiple laser light sources and a microlens array. The array, with microlenses arranged orthogonally, receives laser light and directs it to the phosphor. The elliptical image of the light source on the array has its long axis intersecting both orthogonal microlens arrangement directions. Specifically, the angle formed by the long axis direction of the elliptical light source image and any of the primary alignment directions of the microlenses is 5 degrees or more.
7. The light source device according to claim 1, wherein a plurality of laser lights is emitted from the light source, and a plurality of the light source images on the irradiated surface of the microlens array are arranged in a lattice pattern.
This light source device generates excitation light for a phosphor, comprising multiple laser light sources and a microlens array. The array, with microlenses arranged orthogonally, receives laser light and directs it to the phosphor. The elliptical image of the light source on the array has its long axis intersecting both orthogonal microlens arrangement directions. In this device, multiple laser lights are emitted from the light source, creating several separate elliptical light source images on the microlens array's irradiated surface, and these multiple images are arranged in a lattice pattern.
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July 12, 2019
March 26, 2024
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